- Building Trades. gravel, aggregate, etc., failing to pass through a given screen.
- the residue of any product, as in mining; leavings.
Examples from the Web for tailings
This segregates the large material, which is then conveyed away by the tailings elevator.The A B C of Mining|Charles A. Bramble
So all of value is saved, and the worthless "tailings" go to the dump.Stories of California|Ella M. Sexton
The tailings should be small, containing no light chaff and little full-size grain.Farm Engines and How to Run Them|James H. Stephenson
By law, the tailings which it leaves behind must be leveled, soil placed thereon and either grass or trees planted.The Boy With the U.S. Miners|Francis Rolt-Wheeler
No doubt experience will teach some way of saving the ore that is now wasted in the tailings.A Report on Washington Territory|William Henry Ruffner